We are roommates for 3 years and never once __________ .A．we have quarreledB．hav

题干

We are roommates for 3 years and never once __________ .

A．we have quarreled	B．have we quarreled
C．do we quarrel	D．did we quarrel

上一题下一题 0.4难度单项选择更新时间:2014-09-12 06:20:02

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